1 Chronicles 23:28

23:28 For their office was to wait on the sons of Aaron for the service of the house of Yahweh, in the courts, and in the chambers, and in the purifying of all holy things, even the work of the service of the house of God;
-World English Bible

Other Translation

23:28 Because their office [was] to wait on the sons of Aaron for the service of the house of the LORD, in the courts, and in the chambers, and in the purifying of all holy things, and the work of the service of the house of God;
-King James Version